Question

Diketahui sudut AoC = 120°, jika panjang busur BC= 18cm, panjang busur AC adalah..

*pakai cara ya

Answer 1

AC/BC = AoC/BoC
AC/18 = 120°/(180°-120°)
AC/18 = 120°/60°
AC/18 = 2
AC = 2.18
AC = 36 cm

Answer 2

Sudut AOC = 120°
sudut COB = 60°
panjang busur BC = 18 cm 
panjang busur AC = ? 

cara : 
sudut AOC / sudut BOC = p. busur AC / p. busur BC 
120 / 60 = AC / 18 
P. busur AC = 120 * 18 / 60
                    = 2 * 18 
                    = 36 cm
semoga bermanfaat ^_^ tolong di favorit yaa